Home / 138,867.40-208,463.10-72,382.60

Finding the Fourth Proportional to 138,867.40, 208,463.10 and 72,382.60

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Solution

The fourth proportional to 138,867.40, 208,463.10 and 72,382.60 is: 108,658.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,867.40 : 208,463.10 = 72,382.60 : x
  2. Step 2: Convert to fraction form
    138,867.40/208,463.10 = 72,382.60/x
  3. Step 3: Cross multiply
    138,867.40x = 208,463.10 × 72,382.60
  4. Step 4: Simplify right side
    138,867.40x = 15,089,101,182.06
  5. Step 5: Solve for x
    x = 15,089,101,182.06/138,867.40
  6. Step 6: Final answer
    x = 108,658.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.